This map comes from Solstice: An Electronic Journal of Geography and Mathematics (Volume VII, Number 1, 1996) at the University of Michigan. Authors John Nystuen, Rhonda Ryznar, and Thomas Wagner.

Figure 6. In Figure 6, census tracts with the largest increase in 
greenness are shown with the darkest green and brown tones.  Superimposed 
on this colored pattern are census tracts of high social stress 
(cross-hatched).  High social stress census tracts are defined as those 
tracts with decrease in population greater than 25% between 1980 and 1990 
and with more than 50% of children below the poverty level.  There 
is substantial correspondence between the two patterns.